2 * libwebsockets-test-client - libwebsockets test implementation
4 * Copyright (C) 2011 Andy Green <andy@warmcat.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation:
9 * version 2.1 of the License.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
28 #include "../lib/libwebsockets.h"
31 static unsigned int opts;
32 static int was_closed;
35 * This demo shows how to connect multiple websockets simultaneously to a
36 * websocket server (there is no restriction on their having to be the same
37 * server just it simplifies the demo).
39 * dumb-increment-protocol: we connect to the server and print the number
42 * lws-mirror-protocol: draws random circles, which are mirrored on to every
43 * client (see them being drawn in every browser
44 * session also using the test server)
49 PROTOCOL_DUMB_INCREMENT,
57 /* dumb_increment protocol */
60 callback_dumb_increment(struct libwebsocket_context * this,
61 struct libwebsocket *wsi,
62 enum libwebsocket_callback_reasons reason,
63 void *user, void *in, size_t len)
67 case LWS_CALLBACK_CLIENT_RECEIVE:
68 ((char *)in)[len] = '\0';
69 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
80 /* lws-mirror_protocol */
84 callback_lws_mirror(struct libwebsocket_context * this,
85 struct libwebsocket *wsi,
86 enum libwebsocket_callback_reasons reason,
87 void *user, void *in, size_t len)
89 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
90 LWS_SEND_BUFFER_POST_PADDING];
95 case LWS_CALLBACK_CLOSED:
96 fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
100 case LWS_CALLBACK_CLIENT_ESTABLISHED:
103 * start the ball rolling,
104 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
107 libwebsocket_callback_on_writable(this, wsi);
110 case LWS_CALLBACK_CLIENT_RECEIVE:
111 /* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
114 case LWS_CALLBACK_CLIENT_WRITEABLE:
116 l = sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING],
118 (int)random() & 0xffffff,
123 libwebsocket_write(wsi,
124 &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
126 /* get notified as soon as we can write again */
128 libwebsocket_callback_on_writable(this, wsi);
131 * without at least this delay, we choke the browser
132 * and the connection stalls, despite we now take care about
147 /* list of supported protocols and callbacks */
149 static struct libwebsocket_protocols protocols[] = {
151 [PROTOCOL_DUMB_INCREMENT] = {
152 .name = "dumb-increment-protocol",
153 .callback = callback_dumb_increment,
155 [PROTOCOL_LWS_MIRROR] = {
156 .name = "lws-mirror-protocol",
157 .callback = callback_lws_mirror,
159 [DEMO_PROTOCOL_COUNT] = { /* end of list */
164 static struct option options[] = {
165 { "help", no_argument, NULL, 'h' },
166 { "port", required_argument, NULL, 'p' },
167 { "ssl", no_argument, NULL, 's' },
168 { "killmask", no_argument, NULL, 'k' },
169 { "version", required_argument, NULL, 'v' },
174 int main(int argc, char **argv)
179 struct libwebsocket_context *context;
181 struct libwebsocket *wsi_dumb;
182 struct libwebsocket *wsi_mirror;
183 int ietf_version = -1; /* latest */
185 fprintf(stderr, "libwebsockets test client\n"
186 "(C) Copyright 2010 Andy Green <andy@warmcat.com> "
187 "licensed under LGPL2.1\n");
193 n = getopt_long(argc, argv, "v:khsp:", options, NULL);
198 use_ssl = 2; /* 2 = allow selfsigned */
204 opts = LWS_WRITE_CLIENT_IGNORE_XOR_MASK;
207 ietf_version = atoi(optarg);
217 address = argv[optind];
220 * create the websockets context. This tracks open connections and
221 * knows how to route any traffic and which protocol version to use,
222 * and if each connection is client or server side.
224 * For this client-only demo, we tell it to not listen on any port.
227 context = libwebsocket_create_context(CONTEXT_PORT_NO_LISTEN,
228 protocols, NULL, NULL, -1, -1, 0);
229 if (context == NULL) {
230 fprintf(stderr, "Creating libwebsocket context failed\n");
235 /* create a client websocket using dumb increment protocol */
237 wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
238 "/", argv[optind], argv[optind],
239 protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
241 if (wsi_dumb == NULL) {
242 fprintf(stderr, "libwebsocket dumb connect failed\n");
246 /* create a client websocket using mirror protocol */
248 wsi_mirror = libwebsocket_client_connect(context, address, port,
249 use_ssl, "/", argv[optind], argv[optind],
250 protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
252 if (wsi_mirror == NULL) {
253 fprintf(stderr, "libwebsocket dumb connect failed\n");
257 fprintf(stderr, "Websocket connections opened\n");
260 * sit there servicing the websocket context to handle incoming
261 * packets, and drawing random circles on the mirror protocol websocket
265 while (n >= 0 && !was_closed)
266 n = libwebsocket_service(context, 1000);
268 fprintf(stderr, "Exiting\n");
270 libwebsocket_context_destroy(context);
275 fprintf(stderr, "Usage: libwebsockets-test-client "
276 "<server address> [--port=<p>] "
277 "[--ssl] [-k] [-v <ver>]\n");